I read the "This is the search engine: the core of technical details," The book, see the text in chapter three of the following words aroused my thinking:
This kind of reconstruction strategy is better suited for small document collections because the cost of fully rebuilding the index is high, but the current mainstream business search engine generally uses this way to maintain the update of the index, which is related to the characteristics of the
Vs 2008
A behavior of a class may have multiple implementation policies. You can extract this behavior and define it as an interface. Then, you can provide multiple implementations of this interface. These classes (Policies) can be replaced with each other without affecting the client.Code.
1. Mode UML diagram
2. Application
Examples of discounts for books are divided into general discount prices and gold discount prices. For book sellers, the two discounts are two strategies for selli
Introduced
In this chapter, we will explain the policy of passing arguments to function functions in ECMAScript.
In computer science, this strategy is commonly referred to as "evaluation strategy" (Uncle Note: Some people say that translation into the evaluation strategy, some people translated into assignment strategy
Policy mode: Behavioral modeThe same behavior, different processing algorithms are encapsulated separately. So they can replace each other.1. Define a super-type interface and behavior method2. Define different implementation classes and implement different algorithms for this behavior/** * Strategy mode: For the same command (or behavior), different strategies to do different actions * Product Promotion * This class is: Cash Collection class * *
Define: define a family of algorithms, encapsulate each one, and make them interchangeable. Strategy lets the algorithm vary independently from clients that use it.I. Strategy Mode
The purpose of the rule mode is to encapsulate each algorithm into an independent class with a common interface for mutual replacement. The policy mode allows the algorithm to change without affecting the client.
Suppose we want
Six AI elements required for wireless network strategy and ai elements for wireless network strategy
With the development of artificial intelligence (AI), organizations can transform their wireless networks through predictable, reliable, and measurable WiFi.
Today, artificial intelligence is everywhere. It is widely believed that artificial intelligence will become the next technology to subvert the indust
Introduction to Strategy, strategyI. Introduction to Strategy
The rule mode is the action mode.
Behavior mode:Defines the responsibilities of each object and the communication mode between objects. It standardizes the call and data transmission methods between objects.
The rule mode is suitable for situations where algorithms change frequently.
The algorithm changes will not affect the customers who use the
achieves the equilibrium outcome of multiple games, thus embodying the meaning of the subjective probability.
2. Mixed policy Set
Based on the definition of mixed strategy, it is easy to see that pure policy is a special mixed strategy. For example, a purely strategic strategy for the Ⅰ of the si∈s is a special hybrid
conditional statements, the code will be easier to manage, and future maintenance of the code will be much easier.
The goal now is to refer these validation checks to various policy classes so that they can be reused in proxy methods and other methods. Each validation takes the input value out of the text box, validates it according to the policy that is required by H, and returns a bool value. If the return fails, a Nserror instance is also returned. The returned nserror can explain the caus
get a ticket to get rid of the worry". The advantage of students is that they have a real student ID card when they go home during the cold and summer vacations, A half price can be off without a half price, which is more cost-effective than taking a car home. However, we cannot ignore the truth behind the cheap price. All kinds of ticket snatching are waiting for midnight, so sometimes we have to go home like a night owl.
In comparison, for students, the way to go home is dominated by trains a
architecture
1) role-playing games (RPG and role playing games) role-playing games are generally divided into Japanese and American Games.
2) adventure games (avg, adventure game) focus on the smoothness and suspense of stories.
3) action
depends only on the situation itself, and does not depend on the player's operation, any previous operations, the number of dice, or any other factor; 4. If a player moves and the legal movement set of the situation is empty (that is, it cannot be moved at this time), the player is negative. According to this definition, many of the daily games are not ICG. For example, chess does not meet the condition 3, because the red side can only move the red s
Evolutionary strategy (Evolution strategy)
It is recommended that before understanding ES to ensure that the idea of genetic algorithm has a certain understanding, in the comparison of learning more efficient, paste a previously written genetic algorithm to introduce the same as the genetic algorithm:
are optimized by evolutionary theory, that is, genetic information is used to inherit and mutate the survi
Brief introduction
Policy is one of the behavioral patterns, which allows the behavior or algorithm of an object to change at run time, using different algorithms to achieve the same result or purpose.
Implementation level, define an abstract algorithm interface, and then according to the specific algorithm to define different classes to implement the interface, the invocation of different implementations of the instances can be replaced with each other.
The policy pattern applies to multiple cl
October 24 Aliyun 11 Ecological Carnival Grand Opening, the Aliyun storage products are also with the cloud storage of the various road housekeeping products to customers in good faith, double 11 to buy how to be more affordable, small series for everyone to solve the purchase of crude products introduction:
Strategy One: 10.24-11.10 filling value card • Enjoy back coupons • Smoking Awards
Double 11 preheating activity has officially opened the curt
Summary of some strategies of PHP program efficiency optimization, PHP Efficiency Strategy Summary
1. In the case of file_get_contents instead of file, fopen, feof, Fgets and other series of methods, try to use file_get_contents, because he is much more efficient! But pay attention to file_get_ Contents PHP version problem when opening a URL file; 2. As much as possible file operation, although PHP file operation efficiency is not low;3. Optimize the
Copy CodeThe code is as follows:
/*** Strategy Mode (strategy.php)** Define a series of algorithms, encapsulate them one by one, and make them interchangeable, and the algorithm used can be changed independently of the customers who use it**/---The following are closed----for a series of algorithmsInterface cachetable{Public function get ($key);Public function set ($key, $value);Public Function del ($key);}Do not use cacheClass NoCache implements C
Introduction: Sometimes, the presentation layer of an application must handle coordination between multiple API layer method invocations to complete a single transactional unit of work. In this article, the transaction policy family author Mark Richards will discuss client-side choreography (clients orchestration) transaction policies and explain how to implement it in the Java™ platform.
If you have been reading this series, you should know that you now need an effective and reliable transacti
GOF "design pattern" is described in the strategy mode:
Define a series of algorithms that encapsulate them one by one and make them interchangeable with each other. The strategy mode allows the algorithm to vary independently from the customer who uses it.
The strategy model is based on the following principles:
1 Each object is an individual with responsibil
Analysis of Micro-transaction psychology of mobile vs PC games
Micro-transaction has become a major strategy for developers looking for extra game profits. The two most popular platforms are obviously the mobile and PC markets. However, although their starting points are the same, their micro-transaction operations are very different. It is especially necessary for
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